home *** CD-ROM | disk | FTP | other *** search
- /****************************************************************************
- * parse.c
- *
- * This module implements a parser for the scene description files.
- *
- * from Persistence of Vision Raytracer
- * Copyright 1992 Persistence of Vision Team
- *---------------------------------------------------------------------------
- * Copying, distribution and legal info is in the file povlegal.doc which
- * should be distributed with this file. If povlegal.doc is not available
- * or for more info please contact:
- *
- * Drew Wells [POV-Team Leader]
- * CIS: 73767,1244 Internet: 73767.1244@compuserve.com
- * Phone: (213) 254-4041
- *
- * This program is based on the popular DKB raytracer version 2.12.
- * DKBTrace was originally written by David K. Buck.
- * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
- *
- *****************************************************************************/
-
-
- #include "frame.h"
- #include "vector.h"
- #include "povproto.h"
-
-
-
- /* This file implements a simple recursive-descent parser for reading the
- input file. */
-
- static void Link_Shapes PARAMS((LIGHT_SHAPE *New_Object,LIGHT_SHAPE **Field,LIGHT_SHAPE **Old_Object_List));
- static void Post_Process_Object PARAMS((OBJECT *Object));
- static void Post_Process_Shape PARAMS((SHAPE *Shape));
-
-
-
- extern DBL Max_Trace_Level;
- extern char VerboseFormat;
- extern unsigned int Options;
- extern char Stat_File_Name[FILE_NAME_LENGTH];
-
-
- FRAME *Parsing_Frame_Ptr;
-
- extern METHODS Composite_Methods;
- extern METHODS Basic_Object_Methods;
- extern METHODS Sphere_Methods;
- extern METHODS Point_Methods;
- extern METHODS Quadric_Methods;
- extern METHODS Poly_Methods;
- extern METHODS Box_Methods;
- extern METHODS Blob_Methods;
- extern METHODS Bicubic_Patch_Methods;
- extern METHODS Viewpoint_Methods;
- extern METHODS Plane_Methods;
- extern METHODS Triangle_Methods;
- extern METHODS Smooth_Triangle_Methods;
- extern METHODS CSG_Union_Methods;
- extern METHODS CSG_Intersection_Methods;
- extern METHODS Height_Field_Methods;
-
- extern struct Reserved_Word_Struct Reserved_Words [];
- extern DBL Antialias_Threshold;
-
- extern int term_counts[MAX_ORDER+1];
- extern struct Token_Struct Token;
-
- COLOUR_MAP_ENTRY *Construction_Map = NULL; /* moved here to allow reinitialization */
-
- struct Constant_Struct Constants[MAX_CONSTANTS];
- int Number_Of_Constants;
- TEXTURE *Default_Texture;
- int Degenerate_Triangles;
-
- /* Here we create our own little language for doing the parsing. It
- makes the code easier to read. */
-
- #define EXPECT { int Exit_Flag; Exit_Flag = FALSE; \
- while (!Exit_Flag) {Get_Token(); switch (Token.Token_Id) {
- #define CASE(x) case x:
- #define CASE2(x, y) case x: case y:
- #define CASE3(x, y, z) case x: case y: case z:
- #define CASE4(w, x, y, z) case w: case x: case y: case z:
- #define CASE5(v, w, x, y, z) case v: case w: case x: case y: case z:
- #define CASE6(u, v, w, x, y, z) case u: case v: case w: case x: case y: case z:
- #define END_CASE break;
- #define EXIT Exit_Flag = TRUE;
- #define OTHERWISE default:
- #define END_EXPECT } } }
- #define GET(x) Get_Token(); if (Token.Token_Id != x) Parse_Error (x)
- #define UNGET Unget_Token();
-
- /*
-
- char *Coeff_terms[35] = {
- "x^4", "x^3*y", "x^3*z", "x^3", "x^2*y^2", "x^2*y*z", "x^2*y", "x^2*z^2",
- "x^2*z", "x^2", "x*y^3", "x*y^2*z", "x*y^2", "x*y*z^2", "x*y*z", "x*y",
- "x*z^3", "x*z^2", "x*z", "x", "y^4", "y^3*z", "y^3", "y^2*z^2", "y^2*z",
- "y^2", "y*z^3", "y*z^2", "y*z", "y", "z^4", "z^3", "z^2", "z", ""
- };
-
- void show_quartic(Coeffs)
- DBL *Coeffs;
- {
- int i,j;
- for (i=0,j=0;i<35;i++)
- if (Coeffs[i] != 0.0) {
- if (j) printf(" + ");
- printf("%.5Lg %s", Coeffs[i], Coeff_terms[i]);
- j = 1;
- }
- }
-
- */
-
- /* Parse the file into the given frame. */
- void Parse (Frame_Ptr)
- FRAME *Frame_Ptr;
- {
- OBJECT *Object;
- Parsing_Frame_Ptr = Frame_Ptr;
-
- Degenerate_Triangles = FALSE;
- Token_Init ();
- Frame_Init ();
- Parse_Frame ();
- for (Object = Parsing_Frame_Ptr->Objects;
- Object != NULL;
- Object = Object->Next_Object)
- Post_Process_Object (Object);
- if (Degenerate_Triangles) {
- fprintf (stderr, "Degenerate triangles were found and are being ignored.\n");
- /* exit(1); Let's ignore degen tri instead of blowing up. CdW */
- }
- }
-
- void Token_Init ()
- {
- Number_Of_Constants = 0;
- /*
- Constants = (struct Constant_Struct *)malloc(
- sizeof(struct Constant_Struct) *MAX_CONSTANTS);
- */
- }
-
-
- /* Set up the fields in the frame to default values. */
- void Frame_Init ()
- {
- Default_Texture = Get_Texture();
- Init_Viewpoint(&(Parsing_Frame_Ptr -> View_Point));
- Parsing_Frame_Ptr -> Light_Sources = NULL;
- Parsing_Frame_Ptr -> Objects = NULL;
- Parsing_Frame_Ptr -> Atmosphere_IOR = 1.0;
- Parsing_Frame_Ptr -> Antialias_Threshold = Antialias_Threshold;
- Parsing_Frame_Ptr -> Fog_Distance = 0.0;
- Make_Colour (&(Parsing_Frame_Ptr->Fog_Colour), 0.0, 0.0, 0.0);
- }
-
- /* Allocate and initialize a composite object. */
- COMPOSITE *Get_Composite_Object()
- {
- COMPOSITE *New_Composite;
-
- if ((New_Composite = (COMPOSITE *) malloc (sizeof (COMPOSITE)))
- == NULL)
- Error ("Out of memory. Cannot allocate object");
-
- New_Composite -> Objects = NULL;
- New_Composite -> Next_Object = NULL;
- /* New_Composite -> Next_Light_Source = NULL;*/
- New_Composite -> Bounding_Shapes = NULL;
- New_Composite -> Clipping_Shapes = NULL;
- New_Composite -> Type = COMPOSITE_TYPE;
- New_Composite -> Methods = &Composite_Methods;
- return (New_Composite);
- }
-
- /* Allocate and initialize a sphere. */
- SPHERE *Get_Sphere_Shape()
- {
- SPHERE *New_Shape;
-
- if ((New_Shape = (SPHERE *) malloc (sizeof (SPHERE))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- Make_Vector (&(New_Shape -> Center), 0.0, 0.0, 0.0);
- New_Shape->Radius = 1.0;
- New_Shape->Radius_Squared = 1.0;
- New_Shape->Inverse_Radius = 1.0;
- New_Shape -> Type = SPHERE_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Sphere_Methods;
- New_Shape -> VPCached = FALSE;
- New_Shape -> Inverted = FALSE;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- return (New_Shape);
- }
-
- /* Allocate and initialize a light source. */
- /* A point light source has no shape, but we'll treat it like it does */
-
- LIGHT_SHAPE *Get_Light_Source_Shape()
- {
- LIGHT_SHAPE *New_Shape;
-
- if ((New_Shape = (LIGHT_SHAPE *) malloc (sizeof (LIGHT_SHAPE))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
- Make_Vector (&(New_Shape -> Center), 0.0, 0.0, 0.0);
- Make_Vector (&(New_Shape -> Points_At), 0.0, 0.0, 1.0);
- New_Shape -> Type = POINT_LIGHT_TYPE;
- New_Shape -> Methods = &Point_Methods;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Inverted = FALSE; /* needed so CSG routines don't blow up */
- New_Shape -> Shape_Texture = NULL; /* always NULL */
- New_Shape -> Shape_Colour = Get_Colour(); /* becomes light colour */
- Make_Colour(New_Shape->Shape_Colour, 1.0, 1.0, 1.0);
- New_Shape->Shape_Colour->Alpha = 0.0;
- New_Shape -> Coeff = 10.0;
- New_Shape -> Radius = 0.35;
- New_Shape -> Falloff = 0.35;
- return (New_Shape);
- }
-
- /* Allocate and initialize a quadric surface. */
- QUADRIC *Get_Quadric_Shape()
- {
- QUADRIC *New_Shape;
-
- if ((New_Shape = (QUADRIC *) malloc (sizeof (QUADRIC))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- Make_Vector (&(New_Shape -> Object_2_Terms), 1.0, 1.0, 1.0);
- Make_Vector (&(New_Shape -> Object_Mixed_Terms), 0.0, 0.0, 0.0);
- Make_Vector (&(New_Shape -> Object_Terms), 0.0, 0.0, 0.0);
- New_Shape -> Object_Constant = 1.0;
- New_Shape -> Object_VP_Constant = HUGE_VAL;
- New_Shape -> Constant_Cached = FALSE;
- New_Shape -> Non_Zero_Square_Term = FALSE;
- New_Shape -> Type = QUADRIC_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Quadric_Methods;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- return (New_Shape);
- }
- /* Allocate and initialize a polynomial surface. */
- POLY *Get_Poly_Shape(order)
- int order;
- {
- POLY *New_Shape;
- int i;
-
- if ((New_Shape = (POLY *) malloc (sizeof (POLY))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- New_Shape->Type = POLY_TYPE;
- New_Shape->Next_Object = NULL;
- New_Shape->Methods = &Poly_Methods;
- New_Shape->Shape_Texture = NULL;
- New_Shape->Shape_Colour = NULL;
- New_Shape->Transform = NULL;
- New_Shape->Inverted = 0;
- New_Shape->Order = order;
- New_Shape->Sturm_Flag = 0;
- New_Shape->Coeffs = (DBL *)malloc(term_counts[order] * sizeof(DBL));
- if (New_Shape->Coeffs == NULL)
- Error("Out of memory. Cannot allocate coefficients for POLY");
- for (i=0;i<term_counts[order];i++)
- New_Shape->Coeffs[i] = 0.0;
- return (New_Shape);
- }
-
- /* Allocate and initialize a box. */
- BOX *Get_Box_Shape()
- {
- BOX *New_Shape;
-
- if ((New_Shape = (BOX *) malloc (sizeof (BOX))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- Make_Vector(&(New_Shape->bounds[0]), -1.0, -1.0, -1.0);
- Make_Vector(&(New_Shape->bounds[1]), 1.0, 1.0, 1.0);
- New_Shape -> Transform = NULL;
- New_Shape -> Type = BOX_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Box_Methods;
- New_Shape -> Inverted = FALSE;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- return (New_Shape);
- }
-
- /* Allocate a blob. */
- BLOB *Get_Blob_Shape()
- {
- BLOB *New_Shape;
-
- if ((New_Shape = (BLOB *) malloc (sizeof (BLOB))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- New_Shape -> Transform = NULL;
- New_Shape -> Type = BLOB_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Blob_Methods;
- New_Shape -> Inverted = FALSE;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- return (New_Shape);
- }
-
- /* Allocate and initialize a bicubic patch surface. */
- BICUBIC_PATCH *Get_Bicubic_Patch_Shape()
- {
- BICUBIC_PATCH *New_Shape;
-
- if ((New_Shape = (BICUBIC_PATCH *) malloc (sizeof (BICUBIC_PATCH))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- New_Shape->Type = BICUBIC_PATCH_TYPE;
- New_Shape->Next_Object = NULL;
- New_Shape->Methods = &Bicubic_Patch_Methods;
- New_Shape->Shape_Texture = NULL;
- New_Shape->Shape_Colour = NULL;
- New_Shape->U_Steps = 0;
- New_Shape->V_Steps = 0;
- New_Shape->Intersection_Count = 0;
- New_Shape->Interpolated_Grid = (VECTOR **)NULL;
- New_Shape->Interpolated_Normals = (VECTOR **)NULL;
- New_Shape->Smooth_Normals = (VECTOR **)NULL;
- New_Shape->Interpolated_D = (DBL **)NULL;
- return (New_Shape);
- }
-
- /* Allocate and intialize a Height Field */
- HEIGHT_FIELD *Get_Height_Field_Shape()
- {
- HEIGHT_FIELD *New_Shape;
-
- if((New_Shape = (HEIGHT_FIELD *) malloc (sizeof(HEIGHT_FIELD))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
- New_Shape -> bounding_box = Get_Box_Shape();
- New_Shape -> Map = NULL;
- New_Shape -> Transformation = Get_Transformation();
- New_Shape -> Type = HEIGHT_FIELD_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Height_Field_Methods;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- return(New_Shape);
- }
-
-
- /* Allocate and initialize a plane. */
- PLANE *Get_Plane_Shape()
- {
- PLANE *New_Shape;
-
- if ((New_Shape = (PLANE *) malloc (sizeof (PLANE))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- Make_Vector (&(New_Shape -> Normal_Vector), 0.0, 1.0, 0.0);
- New_Shape->Distance = 0.0;
- New_Shape -> Type = PLANE_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Plane_Methods;
- New_Shape -> VPCached = 0;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- return (New_Shape);
- }
-
- /* Allocate and initialize a triangle. */
- TRIANGLE *Get_Triangle_Shape()
- {
- TRIANGLE *New_Shape;
-
- if ((New_Shape = (TRIANGLE *) malloc (sizeof (TRIANGLE))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- Make_Vector (&(New_Shape -> Normal_Vector), 0.0, 1.0, 0.0);
- Make_Vector (&(New_Shape -> P1), 0.0, 0.0, 0.0);
- Make_Vector (&(New_Shape -> P2), 1.0, 0.0, 0.0);
- Make_Vector (&(New_Shape -> P3), 0.0, 1.0, 0.0);
- New_Shape->Distance = 0.0;
- New_Shape->Inverted = FALSE;
- New_Shape -> Type = TRIANGLE_TYPE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Triangle_Methods;
- New_Shape -> VPCached = FALSE;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- New_Shape -> Degenerate_Flag = FALSE;
- return (New_Shape);
- }
-
- /* Allocate and initialize a smooth triangle. */
- SMOOTH_TRIANGLE *Get_Smooth_Triangle_Shape()
- {
- SMOOTH_TRIANGLE *New_Shape;
-
- if ((New_Shape = (SMOOTH_TRIANGLE *) malloc (sizeof (SMOOTH_TRIANGLE))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- Make_Vector (&(New_Shape -> Normal_Vector), 0.0, 1.0, 0.0);
- Make_Vector (&(New_Shape -> P1), 0.0, 0.0, 0.0);
- Make_Vector (&(New_Shape -> P2), 1.0, 0.0, 0.0);
- Make_Vector (&(New_Shape -> P3), 0.0, 1.0, 0.0);
- Make_Vector (&(New_Shape -> N1), 0.0, 1.0, 0.0);
- Make_Vector (&(New_Shape -> N2), 0.0, 1.0, 0.0);
- Make_Vector (&(New_Shape -> N3), 0.0, 1.0, 0.0);
- New_Shape->Distance = 0.0;
- New_Shape -> Type = SMOOTH_TRIANGLE_TYPE;
- New_Shape->Inverted = FALSE;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Methods = &Smooth_Triangle_Methods;
- New_Shape -> VPCached = 0;
- New_Shape -> Shape_Texture = NULL;
- New_Shape -> Shape_Colour = NULL;
- New_Shape -> Degenerate_Flag = FALSE;
- return (New_Shape);
- }
-
- CSG_SHAPE *Get_CSG_Shape()
- {
- CSG_SHAPE *New_Shape;
-
- if ((New_Shape = (CSG_SHAPE *) malloc (sizeof (CSG_SHAPE))) == NULL)
- Error ("Out of memory. Cannot allocate shape");
-
- New_Shape -> Parent_Object = NULL;
- New_Shape -> Next_Object = NULL;
- New_Shape -> Shapes = NULL;
- return (New_Shape);
- }
-
- CSG_SHAPE *Get_CSG_Union()
- {
- CSG_SHAPE *New_Shape;
-
- New_Shape = Get_CSG_Shape();
- New_Shape -> Methods = &CSG_Union_Methods;
- New_Shape -> Type = CSG_UNION_TYPE;
- return (New_Shape);
- }
-
- CSG_SHAPE *Get_CSG_Intersection()
- {
- CSG_SHAPE *New_Shape;
-
- New_Shape = Get_CSG_Shape();
- New_Shape -> Methods = &CSG_Intersection_Methods;
- New_Shape -> Type = CSG_INTERSECTION_TYPE;
- return (New_Shape);
- }
-
- OBJECT *Get_Object ()
- {
- OBJECT *New_Object;
-
- if ((New_Object = (OBJECT *) malloc (sizeof (OBJECT))) == NULL)
- Error ("Out of memory. Cannot allocate object");
-
- New_Object -> Next_Object = NULL;
- /* New_Object -> Next_Light_Source = NULL;*/
- New_Object -> Shape = NULL;
- New_Object -> Bounding_Shapes = NULL;
- New_Object -> Clipping_Shapes = NULL;
- New_Object -> Object_Texture = Default_Texture;
-
- New_Object->Object_Colour = NULL;
-
- New_Object -> No_Shadow_Flag = FALSE;
- New_Object -> Type = OBJECT_TYPE;
- New_Object -> Methods = &Basic_Object_Methods;
- return (New_Object);
- }
-
- TEXTURE *Get_Texture ()
- {
- TEXTURE *New_Texture;
-
- if ((New_Texture = (TEXTURE *) malloc (sizeof (TEXTURE))) == NULL)
- Error ("Out of memory. Cannot allocate object");
-
- New_Texture -> Next_Texture = NULL;
- New_Texture -> Next_Material = NULL;
- New_Texture -> Number_Of_Materials = 0;
- New_Texture -> Object_Reflection = 0.0;
- New_Texture -> Object_Ambient = 0.1;
- New_Texture -> Object_Diffuse = 0.6;
- New_Texture -> Object_Brilliance = 1.0;
- New_Texture -> Object_Specular = 0.0;
- New_Texture -> Object_Roughness = 0.05;
- New_Texture -> Object_Phong = 0.0;
- New_Texture -> Object_PhongSize = 40;
-
- New_Texture -> Texture_Randomness= 0.0;
- New_Texture -> Bump_Amount = 0.0;
- New_Texture -> Phase = 0.0;
- New_Texture -> Frequency = 1.0;
- New_Texture -> Texture_Number = NO_TEXTURE;
- New_Texture -> Texture_Transformation = NULL;
- New_Texture -> Bump_Number = NO_BUMPS;
- New_Texture -> Turbulence = 0.0;
- New_Texture -> Colour_Map = NULL;
- New_Texture -> Once_Flag = FALSE;
- New_Texture -> Metallic_Flag = FALSE;
- New_Texture -> Octaves = 6; /* dmf, for turbulence functs */
- New_Texture -> Mortar = 0.2; /* rha, for brick texture */
-
- New_Texture -> Constant_Flag = TRUE;
- New_Texture -> Colour1 = NULL;
- New_Texture -> Colour2 = NULL;
- Make_Vector (&New_Texture->Texture_Gradient, 0.0, 0.0, 0.0);
-
- New_Texture -> Object_Index_Of_Refraction = 1.0;
- New_Texture -> Object_Transmit = 0.0;
- New_Texture -> Object_Refraction = 0.0;
- return (New_Texture);
- }
-
-
- VIEWPOINT *Get_Viewpoint ()
- {
- VIEWPOINT *New_Viewpoint;
-
- if ((New_Viewpoint = (VIEWPOINT *)malloc (sizeof (VIEWPOINT)))
- == NULL)
- Error ("Out of memory. Cannot allocate viewpoint");
-
- Init_Viewpoint (New_Viewpoint);
- return (New_Viewpoint);
- }
-
- COLOUR *Get_Colour ()
- {
- COLOUR *New_Colour;
-
- if ((New_Colour = (COLOUR *) malloc (sizeof (COLOUR))) == NULL)
- Error ("Out of memory. Cannot allocate colour");
-
- Make_Colour (New_Colour, 0.0, 0.0, 0.0);
- return (New_Colour);
- }
-
- VECTOR *Get_Vector ()
- {
- VECTOR *New_Vector;
-
- if ((New_Vector = (VECTOR *) malloc (sizeof (VECTOR))) == NULL)
- Error ("Out of memory. Cannot allocate vector");
-
- New_Vector -> x = 0.0;
- New_Vector -> y = 0.0;
- New_Vector -> z = 0.0;
- return (New_Vector);
- }
-
- DBL *Get_Float ()
- {
- DBL *New_Float;
-
- if ((New_Float = (DBL *) malloc (sizeof (DBL))) == NULL)
- Error ("Out of memory. Cannot allocate float");
-
- *New_Float = 0.0;
- return (New_Float);
- }
-
- TRANSFORMATION *Get_Transformation()
- {
- TRANSFORMATION *New_Transformation;
-
- if ((New_Transformation =
- (TRANSFORMATION *) malloc (sizeof (TRANSFORMATION))) == NULL)
- Error ("Out of memory. Cannot allocate transformation");
-
- MIdentity ((MATRIX *) &(New_Transformation -> matrix[0][0]));
- MIdentity ((MATRIX *) &(New_Transformation -> inverse[0][0]));
- return (New_Transformation);
- }
-
- /* Parse a float. Doesn't handle exponentiation. */
- DBL Parse_Float ()
- {
- DBL Local_Float = 0.0;
- CONSTANT Constant_Id;
- register int Negative, Sign_Parsed;
-
- Negative = FALSE;
- Sign_Parsed = FALSE;
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == FLOAT_CONSTANT)
- {
- Local_Float = *((DBL *) Constants[(int)Constant_Id].Constant_Data);
- if (Negative)
- Local_Float *= -1.0;
- }
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- CASE (PLUS_TOKEN)
- if (Sign_Parsed)
- Parse_Error (FLOAT_TOKEN);
- Sign_Parsed = TRUE;
- END_CASE
-
- CASE (DASH_TOKEN)
- if (Sign_Parsed)
- Parse_Error (FLOAT_TOKEN);
- Negative = TRUE;
- Sign_Parsed = TRUE;
- END_CASE
-
- CASE (FLOAT_TOKEN)
- Local_Float = Token.Token_Float;
- if (Negative)
- Local_Float *= -1.0;
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (FLOAT_TOKEN);
- END_CASE
- END_EXPECT
-
- return (Local_Float);
- }
-
- void Parse_Vector (Given_Vector)
- VECTOR *Given_Vector;
- {
- CONSTANT Constant_Id;
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == VECTOR_CONSTANT)
- *Given_Vector = *((VECTOR *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- CASE (LEFT_ANGLE_TOKEN)
- (Given_Vector -> x) = Parse_Float();
- (Given_Vector -> y) = Parse_Float();
- (Given_Vector -> z) = Parse_Float();
- GET (RIGHT_ANGLE_TOKEN);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
- }
-
- void Parse_Coeffs(order, Given_Coeffs)
- int order;
- DBL *Given_Coeffs;
- {
- int i;
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- for (i = 0; i < term_counts[order]; i++)
- Given_Coeffs[i] = Parse_Float();
- GET (RIGHT_ANGLE_TOKEN);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
- }
-
- void Parse_Colour (Given_Colour)
- COLOUR *Given_Colour;
- {
- CONSTANT Constant_Id;
- Make_Colour (Given_Colour, 0.0, 0.0, 0.0);
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == COLOUR_CONSTANT)
- *Given_Colour = *((COLOUR *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- END_CASE
-
- CASE (RED_TOKEN)
- (Given_Colour -> Red) = Parse_Float();
- END_CASE
-
- CASE (GREEN_TOKEN)
- (Given_Colour -> Green) = Parse_Float();
- END_CASE
-
- CASE (BLUE_TOKEN)
- (Given_Colour -> Blue) = Parse_Float();
- END_CASE
-
- CASE (ALPHA_TOKEN)
- (Given_Colour -> Alpha) = Parse_Float();
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- }
-
- COLOUR_MAP *Parse_Colour_Map ()
- {
- #define MAX_ENTRIES 20
- COLOUR_MAP *New_Colour_Map;
-
-
- register int i, j;
-
- if ((New_Colour_Map = (COLOUR_MAP *) malloc (sizeof (COLOUR_MAP))) == NULL)
- Error ("Not enough memory for colour map.");
-
-
- if (Construction_Map == NULL)
- if ((Construction_Map = (COLOUR_MAP_ENTRY *)
- malloc(MAX_ENTRIES * sizeof (COLOUR_MAP_ENTRY))) == NULL)
- Error ("Not enough memory for colour map.");
-
- i = 0;
- New_Colour_Map->Transparency_Flag = FALSE;
- GET(LEFT_CURLY_TOKEN);
- EXPECT
- CASE (LEFT_SQUARE_TOKEN)
- Construction_Map [i].start = Parse_Float();
- Construction_Map [i].end = Parse_Float();
-
- GET (COLOUR_TOKEN);
- Parse_Colour (&(Construction_Map[i].Start_Colour));
- if (Construction_Map[i].Start_Colour.Alpha != 0.0)
- New_Colour_Map->Transparency_Flag = TRUE;
-
- GET (COLOUR_TOKEN);
- Parse_Colour (&(Construction_Map[i].End_Colour));
- if (Construction_Map[i].End_Colour.Alpha != 0.0)
- New_Colour_Map->Transparency_Flag = TRUE;
-
- i++;
- if (i > MAX_ENTRIES)
- Error ("Colour_Map too long.");
- GET (RIGHT_SQUARE_TOKEN);
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- New_Colour_Map -> Number_Of_Entries = i;
-
- if ((New_Colour_Map -> Colour_Map_Entries = (COLOUR_MAP_ENTRY *)
- malloc(sizeof(COLOUR_MAP_ENTRY) * i)) == NULL)
- Error ("Not enough memory for colour map.");
-
- for (j = 0 ; j < i ; j++)
- New_Colour_Map->Colour_Map_Entries[j] = Construction_Map[j];
-
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return (New_Colour_Map);
- }
-
- TEXTURE *Copy_Texture (Texture)
- TEXTURE *Texture;
- {
- TEXTURE *New_Texture, *Local_Texture, *First_Texture, *Previous_Texture;
-
- Previous_Texture = First_Texture = NULL;
-
- for (Local_Texture = Texture ; Local_Texture != NULL ; Local_Texture = Local_Texture->Next_Texture) {
- New_Texture = Get_Texture();
- *New_Texture = *Local_Texture;
-
- if (First_Texture == NULL)
- First_Texture = New_Texture;
-
- if (Previous_Texture != NULL)
- Previous_Texture->Next_Texture = New_Texture;
-
- if (New_Texture->Texture_Transformation) {
- if ((New_Texture->Texture_Transformation = (TRANSFORMATION *) malloc (sizeof (TRANSFORMATION))) == NULL)
- Error("Out of memory. Cannot allocate texture transformation");
- *New_Texture->Texture_Transformation = *Local_Texture->Texture_Transformation;
- }
- New_Texture->Constant_Flag = FALSE;
- Previous_Texture = New_Texture;
- }
- return (First_Texture);
- }
-
- TEXTURE *Parse_Texture ()
- {
- VECTOR Local_Vector;
- TRANSFORMATION Local_Transformation;
- CONSTANT Constant_Id;
- TEXTURE *Texture, *Local_Texture, *First_Texture;
- TEXTURE *temp_texture;
- int reg;
-
- Texture = Default_Texture;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == TEXTURE_CONSTANT) {
- Texture = ((TEXTURE *) Constants[(int)Constant_Id].Constant_Data);
- }
- else
- Type_Error ();
- else
- Undeclared ();
- END_CASE
-
- CASE (FLOAT_TOKEN)
- UNGET
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture(Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Randomness = Parse_Float();
- END_CASE
-
- CASE (ONCE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture(Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture->Once_Flag = TRUE;
- END_CASE
-
- CASE (TURBULENCE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture(Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Turbulence = Parse_Float();
- END_CASE
-
- CASE (OCTAVES_TOKEN) /* dmf 02/05 for turb */
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture(Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture->Octaves = (int) Parse_Float();
- if(Texture->Octaves < 1)
- Texture->Octaves = 6;
- if(Texture->Octaves > 10) /* Avoid DOMAIN errors */
- Texture->Octaves = 10;
- END_CASE
-
- CASE (BOZO_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = BOZO_TEXTURE;
- END_CASE
-
- CASE (MORTAR_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture->Mortar = Parse_Float();
- if (Texture->Mortar < 0)
- Texture->Mortar = 0.2;
- END_CASE
-
- CASE (BRICK_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = BRICK_TEXTURE;
- EXPECT
- CASE (COLOUR_TOKEN)
- Texture->Colour1 = Get_Colour();
- Texture->Colour2 = Get_Colour();
- Parse_Colour (Texture -> Colour1);
- GET (COLOUR_TOKEN);
- Parse_Colour (Texture -> Colour2);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (CHECKER_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = CHECKER_TEXTURE;
- EXPECT
- CASE (COLOUR_TOKEN)
- Texture->Colour1 = Get_Colour();
- Texture->Colour2 = Get_Colour();
- Parse_Colour (Texture -> Colour1);
- GET (COLOUR_TOKEN);
- Parse_Colour (Texture -> Colour2);
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (CHECKER_TEXTURE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = CHECKER_TEXTURE_TEXTURE;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = (TEXTURE *) Texture->Colour1;
- Texture->Colour1 = (COLOUR *) Local_Texture;
- }
- END_CASE
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- GET (TILE2_TOKEN);
- EXPECT
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = (TEXTURE *) Texture->Colour2;
- Texture->Colour2 = (COLOUR *) Local_Texture;
- }
- END_CASE
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- GET (RIGHT_CURLY_TOKEN);
- END_CASE
-
- CASE (MARBLE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = MARBLE_TEXTURE;
- END_CASE
-
- CASE (WOOD_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = WOOD_TEXTURE;
- END_CASE
-
- CASE (SPOTTED_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = SPOTTED_TEXTURE;
- END_CASE
-
- CASE (AGATE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = AGATE_TEXTURE;
- END_CASE
-
- CASE (GRANITE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = GRANITE_TEXTURE;
- END_CASE
-
- CASE (GRADIENT_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = GRADIENT_TEXTURE;
- Parse_Vector (&(Texture -> Texture_Gradient));
- END_CASE
-
- CASE (AMBIENT_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Ambient) = Parse_Float ();
- END_CASE
-
- CASE (BRILLIANCE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Brilliance) = Parse_Float ();
- END_CASE
-
- CASE (ROUGHNESS_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Roughness) = Parse_Float ();
- /* No training wheels */
- /* if (Texture -> Object_Roughness > 1.0)
- Texture -> Object_Roughness = 1.0;
- if (Texture -> Object_Roughness < 0.001)
- Texture -> Object_Roughness = 0.001; */
- END_CASE
-
- CASE (PHONGSIZE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_PhongSize) = Parse_Float ();
- /* No training wheels */
- /*if (Texture -> Object_PhongSize < 1.0)
- Texture -> Object_PhongSize = 1.0;
- if (Texture -> Object_PhongSize > 100)
- Texture -> Object_PhongSize = 100; */
- END_CASE
-
- CASE (DIFFUSE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Diffuse) = Parse_Float ();
- END_CASE
-
- CASE (SPECULAR_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Specular) = Parse_Float ();
- END_CASE
-
- CASE (PHONG_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Phong) = Parse_Float ();
- END_CASE
-
- CASE (METALLIC_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Metallic_Flag = TRUE;
- END_CASE
-
- CASE (IOR_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Index_Of_Refraction) = Parse_Float ();
- END_CASE
-
- CASE (REFRACTION_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Refraction) = Parse_Float ();
- END_CASE
-
- CASE (TRANSMIT_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Transmit) = Parse_Float ();
- END_CASE
-
- CASE (REFLECTION_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- (Texture -> Object_Reflection) = Parse_Float ();
- END_CASE
-
- CASE (IMAGEMAP_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture->Texture_Number = IMAGEMAP_TEXTURE;
- if ((Texture->Image = (IMAGE *)malloc(sizeof(IMAGE))) == NULL)
- Error("Out of memory. Cannot allocate imagemap texture");
- Make_Vector (&Texture->Image->Image_Gradient, 1.0, -1.0, 0.0);
- Texture->Image->Map_Type = PLANAR_MAP;
- Texture->Image->Interpolation_Type = NO_INTERPOLATION;
- Texture->Image->Once_Flag = FALSE;
- Texture->Image->Use_Colour_Flag= TRUE;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE3 (DASH_TOKEN, PLUS_TOKEN, FLOAT_TOKEN)
- UNGET
- (Texture->Image->Map_Type) = (int) Parse_Float ();
- END_CASE
-
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Parse_Vector (&(Texture -> Image->Image_Gradient));
- END_CASE
-
- CASE (IFF_TOKEN)
- GET (STRING_TOKEN);
- Read_Iff_Image(Texture->Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (GIF_TOKEN)
- GET (STRING_TOKEN);
- Read_Gif_Image(Texture->Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (TGA_TOKEN)
- GET (STRING_TOKEN);
- Read_Targa_Image(Texture->Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (DUMP_TOKEN)
- GET (STRING_TOKEN);
- Read_Dump_Image(Texture->Image, Token.Token_String);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (GIF_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (ONCE_TOKEN)
- Texture->Image->Once_Flag=TRUE;
- END_CASE
-
- CASE (INTERPOLATE_TOKEN)
- Texture->Image->Interpolation_Type = (int)Parse_Float();
- END_CASE
-
- CASE (MAPTYPE_TOKEN)
- (Texture->Image->Map_Type) = (int) Parse_Float ();
- END_CASE
-
- CASE (USE_COLOUR_TOKEN)
- Texture ->Image->Use_Colour_Flag = TRUE;
- END_CASE
-
- CASE (USE_INDEX_TOKEN)
- Texture ->Image->Use_Colour_Flag = FALSE;
- END_CASE
-
- CASE (ALPHA_TOKEN)
- EXPECT
- CASE (FLOAT_TOKEN)
- reg = (int)(Token.Token_Float + 0.01);
- if (Texture->Image->Colour_Map == NULL)
- Error ("Can't apply ALPHA to a non colour-mapped image\n");
-
- if ((reg < 0) || (reg >= Texture->Image->Colour_Map_Size))
- Error ("ALPHA colour register value out of range.\n");
-
- Texture->Image->Colour_Map[reg].Alpha = (unsigned short) (255.0 * Parse_Float());
- EXIT
- END_CASE
-
- CASE (ALL_TOKEN)
- {
- DBL alpha;
- alpha = Parse_Float();
-
- for (reg = 0 ; reg < Texture->Image->Colour_Map_Size ; reg++)
- Texture->Image->Colour_Map[reg].Alpha = (unsigned short) (alpha *255.0);
- EXIT
- }
-
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (WAVES_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = WAVES;
- Texture -> Bump_Amount = Parse_Float ();
- EXPECT
- CASE (PHASE_TOKEN)
- Texture -> Phase = Parse_Float();
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (FREQUENCY_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Frequency = Parse_Float();
- END_CASE
-
- CASE (PHASE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Phase = Parse_Float();
- END_CASE
-
- CASE (RIPPLES_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = RIPPLES;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (WRINKLES_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = WRINKLES;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (BUMPS_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = BUMPS;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (DENTS_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = DENTS;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Parse_Vector (&Local_Vector);
- Translate_Texture (&Texture, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Parse_Vector (&Local_Vector);
- Rotate_Texture (&Texture, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Parse_Vector (&Local_Vector);
- Scale_Texture (&Texture, &Local_Vector);
- END_CASE
-
- CASE (COLOUR_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture->Colour1 = Get_Colour();
- Parse_Colour (Texture -> Colour1);
- Texture -> Texture_Number = COLOUR_TEXTURE;
- END_CASE
-
- CASE (COLOUR_MAP_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Colour_Map = Parse_Colour_Map();
- END_CASE
-
- CASE (ONION_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = ONION_TEXTURE;
- END_CASE
-
- CASE (LEOPARD_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = LEOPARD_TEXTURE;
- END_CASE
-
-
-
- /* New Texture Parsing - Cdw */
- CASE (PAINTED1_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = PAINTED1_TEXTURE;
- END_CASE
-
- CASE (PAINTED2_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = PAINTED2_TEXTURE;
- END_CASE
-
- CASE (PAINTED3_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = PAINTED3_TEXTURE;
- END_CASE
-
- CASE (BUMPY1_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = BUMPY1;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (BUMPY2_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = BUMPY2;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (BUMPY3_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = BUMPY3;
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
-
- CASE (BUMPMAP_TOKEN)
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Bump_Number = BUMPMAP;
- if ((Texture->Bump_Image = (IMAGE *)malloc(sizeof(IMAGE))) == NULL)
- Error("Out of memory. Cannot allocate bumpmap texture");
- Make_Vector (&Texture->Bump_Image->Image_Gradient, 1.0, -1.0, 0.0);
- Texture->Bump_Image->Map_Type = PLANAR_MAP;
- Texture->Bump_Image->Interpolation_Type = NO_INTERPOLATION;
- Texture->Bump_Image->Once_Flag = FALSE;
- Texture->Bump_Image->Use_Colour_Flag = TRUE;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE3 (DASH_TOKEN, PLUS_TOKEN, FLOAT_TOKEN)
- UNGET
- (Texture->Bump_Image->Map_Type) = (int) Parse_Float ();
- END_CASE
-
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Parse_Vector (&(Texture ->Bump_Image->Image_Gradient));
- END_CASE
-
- CASE (IFF_TOKEN)
- GET (STRING_TOKEN);
- Read_Iff_Image(Texture->Bump_Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (GIF_TOKEN)
- GET (STRING_TOKEN);
- Read_Gif_Image(Texture->Bump_Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (TGA_TOKEN)
- GET (STRING_TOKEN);
- Read_Targa_Image(Texture->Bump_Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (DUMP_TOKEN)
- GET (STRING_TOKEN);
- Read_Dump_Image(Texture->Bump_Image, Token.Token_String);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (GIF_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (ONCE_TOKEN)
- Texture->Bump_Image->Once_Flag=TRUE;
- END_CASE
-
- CASE (MAPTYPE_TOKEN)
- (Texture->Bump_Image->Map_Type) = (int) Parse_Float ();
- END_CASE
-
- CASE (INTERPOLATE_TOKEN)
- Texture->Bump_Image->Interpolation_Type = (int)Parse_Float();
- END_CASE
-
- CASE (BUMPSIZE_TOKEN)
- Texture -> Bump_Amount = Parse_Float ();
- END_CASE
-
- CASE (USE_COLOUR_TOKEN)
- Texture ->Bump_Image->Use_Colour_Flag = TRUE;
- END_CASE
- CASE (USE_INDEX_TOKEN)
- Texture ->Bump_Image->Use_Colour_Flag = FALSE;
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- END_CASE
-
-
- CASE (MATERIAL_MAP_TOKEN)
-
- if (Texture->Constant_Flag) {
- Texture = Copy_Texture (Texture);
- Texture->Constant_Flag = FALSE;
- }
- Texture -> Texture_Number = MATERIAL_MAP_TEXTURE;
- if ((Texture->Material_Image=(IMAGE *)malloc(sizeof(IMAGE))) == NULL)
- Error("Out of memory. Cannot allocate material map texture");
- Make_Vector (&Texture->Texture_Gradient, 1.0, -1.0, 0.0);
- Texture->Material_Image->Map_Type = PLANAR_MAP;
- Texture->Material_Image->Interpolation_Type = NO_INTERPOLATION;
- Texture->Material_Image->Once_Flag = FALSE;
- Texture->Material_Image->Use_Colour_Flag = FALSE;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE3 (DASH_TOKEN, PLUS_TOKEN, FLOAT_TOKEN)
- UNGET
- (Texture->Image->Map_Type) = (int) Parse_Float ();
- END_CASE
-
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Parse_Vector (&(Texture ->Material_Image->Image_Gradient));
- END_CASE
-
- CASE (IFF_TOKEN)
- GET (STRING_TOKEN);
- Read_Iff_Image(Texture->Material_Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (GIF_TOKEN)
- GET (STRING_TOKEN);
- Read_Gif_Image(Texture->Material_Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (TGA_TOKEN)
- GET (STRING_TOKEN);
- Read_Targa_Image(Texture->Material_Image, Token.Token_String);
- EXIT
- END_CASE
-
- CASE (DUMP_TOKEN)
- GET (STRING_TOKEN);
- Read_Dump_Image(Texture->Material_Image, Token.Token_String);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (GIF_TOKEN);
- END_CASE
- END_EXPECT
-
- /* remember where the First_Texture is */
- First_Texture = Texture;
-
- EXPECT
-
- CASE (MAPTYPE_TOKEN)
- (Texture->Material_Image->Map_Type) = (int) Parse_Float ();
- END_CASE
-
- CASE (INTERPOLATE_TOKEN)
- Texture->Material_Image->Interpolation_Type=(int)Parse_Float();
- END_CASE
-
- CASE (ONCE_TOKEN)
- Texture->Material_Image->Once_Flag=TRUE;
- END_CASE
-
-
- CASE (TEXTURE_TOKEN) {
- Texture->Next_Material = Parse_Texture ();
- First_Texture->Number_Of_Materials++;
- Texture = Texture->Next_Material;
- }
-
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN){
- Texture->Next_Material = NULL;
- Texture = First_Texture;
- EXIT
- }
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- return (Texture);
- }
-
- SHAPE *Parse_Light_Source ()
- {
- LIGHT_SHAPE *Local_Shape;
- VECTOR Local_Vector;
- CONSTANT Constant_Id;
-
-
- GET (LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = Get_Light_Source_Shape();
- Parse_Vector(&(Local_Shape->Center));
- Local_Shape->Shape_Colour = Get_Colour();
- Make_Colour(Local_Shape->Shape_Colour, 1.0, 1.0, 1.0);
- Local_Shape->Shape_Colour->Alpha = 0.0;
- GET (COLOUR_TOKEN);
- Parse_Colour (Local_Shape->Shape_Colour);
- EXIT
- END_CASE
-
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == LIGHT_SOURCE_CONSTANT)
- Local_Shape = (LIGHT_SHAPE *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- /* Point that the spot is pointed at */
- CASE (POINT_AT_TOKEN)
- Parse_Vector(&(Local_Shape -> Points_At));
- END_CASE
-
- CASE (TIGHTNESS_TOKEN)
- Local_Shape -> Coeff = Parse_Float();
- END_CASE
-
- CASE (RADIUS_TOKEN)
- Local_Shape -> Radius = cos(Parse_Float() * M_PI / 180.0);
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
-
- CASE (FALLOFF_TOKEN)
- Local_Shape -> Falloff = cos(Parse_Float() * M_PI / 180.0);
- END_CASE
-
- CASE (SPOTLIGHT_TOKEN)
- Local_Shape -> Type = SPOT_LIGHT_TYPE;
- END_CASE
-
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
-
- END_EXPECT
- /* Link_Shapes (Local_Shape, &(Local_Shape -> Next_Light_Source),
- &(Parsing_Frame_Ptr -> Light_Sources));
- */
- return ((SHAPE *) Local_Shape);
- }
-
-
-
-
- SHAPE *Parse_Sphere ()
- {
- SPHERE *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = Get_Sphere_Shape();
- Parse_Vector(&(Local_Shape -> Center));
- Local_Shape -> Radius = Parse_Float();
- Local_Shape -> Radius_Squared = Local_Shape -> Radius * Local_Shape -> Radius;
- Local_Shape -> Inverse_Radius = 1.0 / Local_Shape -> Radius;
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == SPHERE_CONSTANT)
- Local_Shape = (SPHERE *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
-
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Plane ()
- {
- PLANE *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = Get_Plane_Shape();
- Parse_Vector(&(Local_Shape -> Normal_Vector));
- Local_Shape->Distance = Parse_Float();
- Local_Shape->Distance *= -1.0;
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == PLANE_CONSTANT)
- Local_Shape = (PLANE *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
-
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Height_Field ()
- {
- HEIGHT_FIELD *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- IMAGE *Image;
- int Image_Type;
-
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT /* This should be modified to include other image types - CdW */
- CASE (GIF_TOKEN)
- Image_Type = GIF;
- Local_Shape = Get_Height_Field_Shape();
- if((Image = (IMAGE *) malloc(sizeof(IMAGE))) == NULL)
- Error("Out of memory. Cannot allocate space for Height Field (1st message).");
- GET(STRING_TOKEN);
- Read_Gif_Image(Image,Token.Token_String);
- Local_Shape -> bounding_box -> bounds[0].x = 1.0;
- Local_Shape -> bounding_box -> bounds[0].y = 0.0;
- Local_Shape -> bounding_box -> bounds[0].z = 1.0;
- Local_Shape -> bounding_box -> bounds[1].x = Image -> width - 2.0;
- Local_Shape -> bounding_box -> bounds[1].y = 256.0;
- Local_Shape -> bounding_box -> bounds[1].z = Image -> height - 2.0;
- Make_Vector(&Local_Vector,1.0/(Image->width),1.0/256.0,1.0/(Image->height));
- Get_Scaling_Transformation(Local_Shape->Transformation,&Local_Vector);
- EXIT
- END_CASE
-
- CASE (POT_TOKEN)
- Image_Type = POT;
- Local_Shape = Get_Height_Field_Shape();
- if((Image = (IMAGE *) malloc(sizeof(IMAGE))) == NULL)
- Error("Out of memory. Cannot allocate space for Height Field (1st message).");
- GET(STRING_TOKEN);
- Read_Gif_Image(Image,Token.Token_String);
- Local_Shape -> bounding_box -> bounds[0].x = 1.0;
- Local_Shape -> bounding_box -> bounds[0].y = 0.0;
- Local_Shape -> bounding_box -> bounds[0].z = 1.0;
- Local_Shape -> bounding_box -> bounds[1].x = Image -> width/2.0 - 2.0;
- Local_Shape -> bounding_box -> bounds[1].y = 256.0;
- Local_Shape -> bounding_box -> bounds[1].z = Image -> height - 2.0;
- Make_Vector(&Local_Vector,2.0/Image->width,1.0/256.0,1.0/Image->height);
- Get_Scaling_Transformation(Local_Shape->Transformation,&Local_Vector);
- EXIT
- END_CASE
-
- CASE (TGA_TOKEN)
- Image_Type = TGA;
- Local_Shape = Get_Height_Field_Shape();
- if((Image = (IMAGE *) malloc(sizeof(IMAGE))) == NULL)
- Error("Cannot allocate space for Height Field (1st message).");
- GET(STRING_TOKEN);
- Read_Targa_Image(Image,Token.Token_String);
- Local_Shape -> bounding_box -> bounds[0].x = 1.0;
- Local_Shape -> bounding_box -> bounds[0].y = 0.0;
- Local_Shape -> bounding_box -> bounds[0].z = 1.0;
- Local_Shape -> bounding_box -> bounds[1].x = Image -> width - 2.0;
- Local_Shape -> bounding_box -> bounds[1].y = 256.0;
- Local_Shape -> bounding_box -> bounds[1].z = Image -> height - 2.0;
- Make_Vector(&Local_Vector,1.0/Image->width,1.0/256.0,1.0/Image->height);
- Get_Scaling_Transformation(Local_Shape->Transformation,&Local_Vector);
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == HEIGHT_FIELD_CONSTANT)
- Local_Shape = (HEIGHT_FIELD *)Copy((OBJECT *)Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (GIF_TOKEN);
- END_CASE
-
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (WATER_LEVEL_TOKEN)
- Local_Shape -> bounding_box -> bounds[0].y = Parse_Float();
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- TEXTURE *temp_texture;
-
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- Find_Hf_Min_Max(Local_Shape, Image, Image_Type);
- return ((SHAPE *) Local_Shape);
- }
-
-
- SHAPE *Parse_Triangle ()
- {
- TRIANGLE *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = Get_Triangle_Shape();
- Parse_Vector (&Local_Shape->P1);
- Parse_Vector (&Local_Shape->P2);
- Parse_Vector (&Local_Shape->P3);
- if (!Compute_Triangle (Local_Shape)) {
- fprintf (stderr, "Degenerate triangle on line %d. Please remove.\n",
- Token.Token_Line_No);
- Degenerate_Triangles = TRUE;
- }
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == TRIANGLE_CONSTANT)
- Local_Shape = (TRIANGLE *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Smooth_Triangle ()
- {
- SMOOTH_TRIANGLE *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = (SMOOTH_TRIANGLE *) Get_Smooth_Triangle_Shape();
- Parse_Vector (&Local_Shape->P1);
- Parse_Vector (&Local_Shape->N1);
- VNormalize (Local_Shape->N1, Local_Shape->N1)
- Parse_Vector (&Local_Shape->P2);
- Parse_Vector (&Local_Shape->N2);
- VNormalize (Local_Shape->N2, Local_Shape->N2)
- Parse_Vector (&Local_Shape->P3);
- Parse_Vector (&Local_Shape->N3);
- VNormalize (Local_Shape->N3, Local_Shape->N3)
- if (!Compute_Triangle ((TRIANGLE *) Local_Shape)) {
- fprintf (stderr, "Degenerate triangle on line %d. Please remove.\n",
- Token.Token_Line_No);
- Degenerate_Triangles = TRUE;
- }
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == SMOOTH_TRIANGLE_CONSTANT)
- Local_Shape = (SMOOTH_TRIANGLE *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Quadric ()
- {
- QUADRIC *Local_Shape;
- VECTOR Local_Vector;
- CONSTANT Constant_Id;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = Get_Quadric_Shape();
- Parse_Vector(&(Local_Shape -> Object_2_Terms));
- Parse_Vector(&(Local_Shape -> Object_Mixed_Terms));
- Parse_Vector(&(Local_Shape -> Object_Terms));
- (Local_Shape -> Object_Constant) = Parse_Float();
- Local_Shape -> Non_Zero_Square_Term =
- !((Local_Shape -> Object_2_Terms.x == 0.0)
- && (Local_Shape -> Object_2_Terms.y == 0.0)
- && (Local_Shape -> Object_2_Terms.z == 0.0)
- && (Local_Shape -> Object_Mixed_Terms.x == 0.0)
- && (Local_Shape -> Object_Mixed_Terms.y == 0.0)
- && (Local_Shape -> Object_Mixed_Terms.z == 0.0));
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == QUADRIC_CONSTANT)
- Local_Shape = (QUADRIC *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Poly (known_order)
- int known_order;
- {
- POLY *Local_Shape;
- VECTOR Local_Vector;
- CONSTANT Constant_Id;
- int order;
- TEXTURE *Local_Texture;
-
- if (known_order > 0)
- Local_Shape = Get_Poly_Shape(known_order);
- else
- Local_Shape = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE3 (DASH_TOKEN, PLUS_TOKEN, FLOAT_TOKEN)
- UNGET
- if (Local_Shape != NULL)
- Error("The order of a polynomial may not be specified twice");
- order = (int)Parse_Float();
- if (order < 2 || order > MAX_ORDER)
- Error("Order of Poly is out of range");
- Local_Shape = Get_Poly_Shape(order);
- END_CASE
-
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- if (Local_Shape == NULL)
- printf("Need the order of the Poly");
- Parse_Coeffs(Local_Shape->Order, &(Local_Shape->Coeffs[0]));
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == POLY_CONSTANT)
- Local_Shape = (POLY *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (STURM_TOKEN)
- Local_Shape->Sturm_Flag = 1;
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- Link ((OBJECT *) Local_Texture,
- (OBJECT **) &Local_Texture->Next_Texture,
- (OBJECT **) &Local_Shape->Shape_Texture);
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Bicubic_Patch ()
- {
- BICUBIC_PATCH *Local_Shape;
- VECTOR Local_Vector;
- CONSTANT Constant_Id;
- TEXTURE *Local_Texture;
- int i, j;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE3 (DASH_TOKEN, PLUS_TOKEN, FLOAT_TOKEN)
- UNGET
- Local_Shape = Get_Bicubic_Patch_Shape();
- Local_Shape->Patch_Type = (int)Parse_Float();
- if (Local_Shape->Patch_Type == 2 ||
- Local_Shape->Patch_Type == 3)
- Local_Shape->Flatness_Value = Parse_Float();
- else
- Local_Shape->Flatness_Value = 0.1;
- Local_Shape->U_Steps = (int)Parse_Float();
- Local_Shape->V_Steps = (int)Parse_Float();
- for (i=0;i<4;i++) for (j=0;j<4;j++)
- Parse_Vector(&(Local_Shape -> Control_Points[i][j]));
- Precompute_Patch_Values(Local_Shape); /* interpolated mesh coords */
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type==BICUBIC_PATCH_CONSTANT)
- Local_Shape = (BICUBIC_PATCH *) Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- Link ((OBJECT *) Local_Texture,
- (OBJECT **) &Local_Texture->Next_Texture,
- (OBJECT **) &Local_Shape->Shape_Texture);
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
-
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Box ()
- {
- BOX *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Local_Shape = NULL;
- EXPECT
- CASE (LEFT_CURLY_TOKEN)
- EXIT
- END_CASE
- OTHERWISE
- Parse_Error (LEFT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Local_Shape = Get_Box_Shape();
- Parse_Vector(&(Local_Shape->bounds[0]));
- Parse_Vector(&(Local_Shape->bounds[1]));
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == BOX_CONSTANT)
- Local_Shape = (BOX *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (LEFT_ANGLE_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
- SHAPE *Parse_Blob ()
- {
- BLOB *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
- DBL threshold;
- int npoints;
- blobstackptr blob_components, blob_component;
-
- Local_Shape = NULL;
- EXPECT
- CASE (LEFT_CURLY_TOKEN)
- EXIT
- END_CASE
- OTHERWISE
- Parse_Error (LEFT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE2 (THRESHOLD_TOKEN, COMPONENT_TOKEN)
- UNGET
- Local_Shape = Get_Blob_Shape();
- blob_components = NULL;
- npoints = 0;
- threshold = 1.0;
-
- /* Here is where we get the blob coefficients */
- EXPECT
- CASE (THRESHOLD_TOKEN)
- threshold = Parse_Float();
- END_CASE
-
- CASE (COMPONENT_TOKEN)
- blob_component = (blobstackptr) malloc(sizeof(struct
- blob_list_struct));
- if (blob_component == NULL)
- Error("Out of Memory! Cannot allocate blob component");
- blob_component->elem.coeffs[2] = Parse_Float();
- blob_component->elem.radius2 = Parse_Float();
- Parse_Vector(&blob_component->elem.pos);
- blob_component->next = blob_components;
- blob_components = blob_component;
- npoints++;
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- /* Finally, process the information */
- MakeBlob((OBJECT *)Local_Shape, threshold, blob_components, npoints, 0);
- EXIT
- END_CASE
-
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == BLOB_CONSTANT)
- Local_Shape = (BLOB *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (FLOAT_TOKEN);
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (STURM_TOKEN)
- Local_Shape->Sturm_Flag = 1;
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Shape, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Shape);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Local_Shape->Shape_Texture;
- Local_Shape->Shape_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Local_Shape->Shape_Colour = Get_Colour();
- Parse_Colour (Local_Shape->Shape_Colour);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((SHAPE *) Local_Shape);
- }
-
-
- CSG_SHAPE *Parse_CSG (type, Parent_Object)
- int type;
- OBJECT *Parent_Object;
- {
- CSG_SHAPE *Container = NULL;
- SHAPE *Local_Shape;
- VECTOR Local_Vector;
- CONSTANT Constant_Id;
- int First_Shape_Parsed = FALSE;
-
- if (type == CSG_UNION_TYPE)
- Container = Get_CSG_Union ();
-
- else if ((type == CSG_INTERSECTION_TYPE) || (type == CSG_DIFFERENCE_TYPE))
- Container = Get_CSG_Intersection ();
-
- Container -> Parent_Object = Parent_Object;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if ((Constants[(int)Constant_Id].Constant_Type == CSG_INTERSECTION_CONSTANT)
- || (Constants[(int)Constant_Id].Constant_Type == CSG_UNION_CONSTANT)
- || (Constants[(int)Constant_Id].Constant_Type == CSG_DIFFERENCE_CONSTANT)) {
- free (Container);
- Container = (CSG_SHAPE *) Copy ((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- Set_CSG_Parents(Container, Parent_Object);
- }
- else
- Type_Error ();
- else
- Undeclared ();
- END_CASE
-
- CASE (LIGHT_SOURCE_TOKEN)
- Local_Shape = Parse_Light_Source ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (SPHERE_TOKEN)
- Local_Shape = Parse_Sphere ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (PLANE_TOKEN)
- Local_Shape = Parse_Plane ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (TRIANGLE_TOKEN)
- Local_Shape = Parse_Triangle ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (SMOOTH_TRIANGLE_TOKEN)
- Local_Shape = Parse_Smooth_Triangle ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (QUADRIC_TOKEN)
- Local_Shape = Parse_Quadric ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (HEIGHT_FIELD_TOKEN)
- Local_Shape = Parse_Height_Field ();
- Local_Shape -> Parent_Object = Parent_Object;
- if((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape-> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
-
- CASE (CUBIC_TOKEN)
- Local_Shape = Parse_Poly (3);
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (QUARTIC_TOKEN)
- Local_Shape = Parse_Poly (4);
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (POLY_TOKEN)
- Local_Shape = Parse_Poly (0);
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (BOX_TOKEN)
- Local_Shape = Parse_Box ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (BLOB_TOKEN)
- Local_Shape = Parse_Blob ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (BICUBIC_PATCH_TOKEN)
- Local_Shape = Parse_Bicubic_Patch ();
- Local_Shape -> Parent_Object = Parent_Object;
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (UNION_TOKEN)
- Local_Shape = (SHAPE *) Parse_CSG (CSG_UNION_TYPE, Parent_Object);
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (INTERSECTION_TOKEN)
- Local_Shape = (SHAPE *) Parse_CSG (CSG_INTERSECTION_TYPE, Parent_Object);
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- CASE (DIFFERENCE_TOKEN)
- Local_Shape = (SHAPE *) Parse_CSG (CSG_DIFFERENCE_TYPE, Parent_Object);
- if ((type == CSG_DIFFERENCE_TYPE) && First_Shape_Parsed)
- Invert ((OBJECT *) Local_Shape);
- First_Shape_Parsed = TRUE;
- Link((OBJECT *) Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Container -> Shapes));
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate((OBJECT *) Container, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Container, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Container, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Container);
- END_CASE
-
- OTHERWISE
- if (type == CSG_UNION_TYPE)
- Parse_Error (RIGHT_CURLY_TOKEN);
- else if (type == CSG_INTERSECTION_TYPE)
- Parse_Error (RIGHT_CURLY_TOKEN);
- else
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((CSG_SHAPE *) Container);
- }
-
- SHAPE *Parse_Shape (Object)
- OBJECT *Object;
- {
- SHAPE *Local_Shape = NULL;
-
- EXPECT
- CASE (LIGHT_SOURCE_TOKEN)
- Local_Shape = Parse_Light_Source ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
-
- CASE (SPHERE_TOKEN)
- Local_Shape = Parse_Sphere ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (PLANE_TOKEN)
- Local_Shape = Parse_Plane ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (TRIANGLE_TOKEN)
- Local_Shape = Parse_Triangle ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (SMOOTH_TRIANGLE_TOKEN)
- Local_Shape = Parse_Smooth_Triangle ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (QUADRIC_TOKEN)
- Local_Shape = Parse_Quadric ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (HEIGHT_FIELD_TOKEN)
- Local_Shape = Parse_Height_Field ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (CUBIC_TOKEN)
- Local_Shape = Parse_Poly (3);
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (QUARTIC_TOKEN)
- Local_Shape = Parse_Poly (4);
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (POLY_TOKEN)
- Local_Shape = Parse_Poly (0);
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (BOX_TOKEN)
- Local_Shape = Parse_Box ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (BLOB_TOKEN)
- Local_Shape = Parse_Blob ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (BICUBIC_PATCH_TOKEN)
- Local_Shape = Parse_Bicubic_Patch ();
- Local_Shape -> Parent_Object = Object;
- EXIT
- END_CASE
-
- CASE (UNION_TOKEN)
- Local_Shape = (SHAPE *) Parse_CSG (CSG_UNION_TYPE, Object);
- EXIT
- END_CASE
-
- CASE (INTERSECTION_TOKEN)
- Local_Shape = (SHAPE *) Parse_CSG (CSG_INTERSECTION_TYPE, Object);
- EXIT
- END_CASE
-
- CASE (DIFFERENCE_TOKEN)
- Local_Shape = (SHAPE *) Parse_CSG (CSG_DIFFERENCE_TYPE, Object);
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (QUADRIC_TOKEN);
- END_CASE
- END_EXPECT
- return (Local_Shape);
- }
-
- OBJECT *Parse_Object ()
- {
- OBJECT *Object;
- SHAPE *Local_Shape;
- VECTOR Local_Vector;
- CONSTANT Constant_Id;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
-
- Object = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == OBJECT_CONSTANT)
- Object = (OBJECT *) Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- EXIT
- END_CASE
-
- CASE6 (SPHERE_TOKEN, QUADRIC_TOKEN, QUARTIC_TOKEN, UNION_TOKEN,
- INTERSECTION_TOKEN, DIFFERENCE_TOKEN)
- CASE6 (TRIANGLE_TOKEN, SMOOTH_TRIANGLE_TOKEN, PLANE_TOKEN, CUBIC_TOKEN,
- POLY_TOKEN, BICUBIC_PATCH_TOKEN)
- CASE4 (HEIGHT_FIELD_TOKEN, LIGHT_SOURCE_TOKEN, BOX_TOKEN, BLOB_TOKEN)
- UNGET
- if (Object == NULL)
- Object = Get_Object();
-
- Local_Shape = Parse_Shape(Object);
- Link((OBJECT *)Local_Shape, (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Object -> Shape));
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (SHAPE_TOKEN);
- EXIT
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (BOUNDED_TOKEN)
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Local_Shape = Parse_Shape(Object);
- Link((OBJECT *) Local_Shape,
- (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Object -> Bounding_Shapes));
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (CLIPPED_TOKEN)
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Local_Shape = Parse_Shape(Object);
- Link((OBJECT *) Local_Shape,
- (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Object -> Clipping_Shapes));
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Object->Object_Colour = Get_Colour();
- Parse_Colour (Object -> Object_Colour);
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- if (Object->Object_Texture == Default_Texture)
- Object->Object_Texture = Local_Texture;
- else
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = Object->Object_Texture;
- Object->Object_Texture = Local_Texture;
- }
- END_CASE
-
- CASE (NO_SHADOW_TOKEN)
- Object -> No_Shadow_Flag = TRUE;
- END_CASE
-
- CASE (LIGHT_SOURCE_TOKEN)
- Error("Light source must be defined using new syntax");
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate (Object, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate (Object, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale (Object, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert (Object);
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
-
- END_EXPECT
-
- return (Object);
- }
-
- OBJECT *Parse_Composite ()
- {
- COMPOSITE *Local_Composite;
- OBJECT *Local_Object;
- SHAPE *Local_Shape;
- CONSTANT Constant_Id;
- VECTOR Local_Vector;
-
- Local_Composite = NULL;
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == COMPOSITE_CONSTANT)
- Local_Composite = (COMPOSITE *)Copy((OBJECT *) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- END_CASE
-
- CASE (COMPOSITE_TOKEN)
- if (Local_Composite == NULL)
- Local_Composite = Get_Composite_Object();
-
- Local_Object = Parse_Composite();
- Link((OBJECT *) Local_Object,(OBJECT **) &(Local_Object -> Next_Object),
- (OBJECT **) &(Local_Composite -> Objects));
- END_CASE
-
- CASE (OBJECT_TOKEN)
- if (Local_Composite == NULL)
- Local_Composite = Get_Composite_Object();
-
- Local_Object = Parse_Object();
- Link(Local_Object, &(Local_Object -> Next_Object),
- &(Local_Composite -> Objects));
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- UNGET
- if (Local_Composite == NULL)
- Local_Composite = Get_Composite_Object();
-
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- CASE (BOUNDED_TOKEN)
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Local_Shape = Parse_Shape((OBJECT *) Local_Composite);
- Link((OBJECT *) Local_Shape,
- (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Local_Composite -> Bounding_Shapes));
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (CLIPPED_TOKEN)
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- UNGET
- Local_Shape = Parse_Shape((OBJECT *) Local_Composite);
- Link((OBJECT *) Local_Shape,
- (OBJECT **) &(Local_Shape -> Next_Object),
- (OBJECT **) &(Local_Composite -> Clipping_Shapes));
- END_CASE
- END_EXPECT
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Local_Composite, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Local_Composite, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Local_Composite, &Local_Vector);
- END_CASE
-
- CASE (INVERSE_TOKEN)
- Invert ((OBJECT *) Local_Composite);
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
-
- return ((OBJECT *) Local_Composite);
- }
-
- void Parse_Fog ()
- {
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (COLOUR_TOKEN)
- Parse_Colour (&Parsing_Frame_Ptr->Fog_Colour);
- END_CASE
-
- CASE (FLOAT_TOKEN)
- Parsing_Frame_Ptr->Fog_Distance = Token.Token_Float;
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- }
-
- /*
- }
- */
-
- void Parse_Frame ()
- {
- OBJECT *Local_Object;
-
- EXPECT
- CASE (FOG_TOKEN)
- Parse_Fog();
- END_CASE
-
-
- CASE (DEFAULT_TOKEN)
- GET(LEFT_CURLY_TOKEN);
- EXPECT
- CASE (TEXTURE_TOKEN)
- Default_Texture->Constant_Flag = FALSE;
- Default_Texture = Parse_Texture ();
- Default_Texture->Constant_Flag = TRUE;
- END_CASE
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- END_CASE
-
-
- CASE (MAX_TRACE_LEVEL_TOKEN)
- Max_Trace_Level = Parse_Float ();
- END_CASE
-
- CASE (OBJECT_TOKEN)
- Local_Object = Parse_Object();
- Link(Local_Object, &(Local_Object -> Next_Object),
- &(Parsing_Frame_Ptr -> Objects));
-
- /* light sources are now linked in object parsing */
- /* if (Local_Object -> Light_Source_Flag)
- Link(Local_Object, &(Local_Object -> Next_Light_Source),
- &(Parsing_Frame_Ptr -> Light_Sources)); */
- END_CASE
-
- CASE (COMPOSITE_TOKEN)
- Local_Object = Parse_Composite();
- Link(Local_Object, &(Local_Object -> Next_Object),
- &(Parsing_Frame_Ptr -> Objects));
-
- /* Add_Composite_Light_Source ((COMPOSITE *)Local_Object);*/
- END_CASE
-
- CASE (VIEW_POINT_TOKEN)
- Parse_Viewpoint(&(Parsing_Frame_Ptr -> View_Point));
- END_CASE
-
- CASE (DECLARE_TOKEN)
- Parse_Declare ();
- END_CASE
-
- CASE (END_OF_FILE_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (OBJECT_TOKEN);
- END_CASE
- END_EXPECT
- }
-
- void Parse_Viewpoint (Given_Vp)
- VIEWPOINT *Given_Vp;
- {
- CONSTANT Constant_Id;
- VECTOR Local_Vector, Temp_Vector;
- DBL Direction_Length, Up_Length, Right_Length, Handedness;
-
- Init_Viewpoint (Given_Vp);
-
- GET(LEFT_CURLY_TOKEN);
-
- EXPECT
- CASE (IDENTIFIER_TOKEN)
- if ((Constant_Id = Find_Constant()) != -1)
- if (Constants[(int)Constant_Id].Constant_Type == VIEW_POINT_CONSTANT)
- *Given_Vp =
- *((VIEWPOINT*) Constants[(int)Constant_Id].Constant_Data);
- else
- Type_Error ();
- else
- Undeclared ();
- END_CASE
-
- CASE (LOCATION_TOKEN)
- Parse_Vector(&(Given_Vp -> Location));
- END_CASE
-
- CASE (DIRECTION_TOKEN)
- Parse_Vector(&(Given_Vp -> Direction));
- END_CASE
-
- CASE (UP_TOKEN)
- Parse_Vector(&(Given_Vp -> Up));
- END_CASE
-
- CASE (RIGHT_TOKEN)
- Parse_Vector(&(Given_Vp -> Right));
- END_CASE
-
- CASE (SKY_TOKEN)
- Parse_Vector(&(Given_Vp -> Sky));
- END_CASE
-
- CASE (LOOK_AT_TOKEN)
- VLength (Direction_Length, Given_Vp->Direction);
- VLength (Up_Length, Given_Vp->Up);
- VLength (Right_Length, Given_Vp->Right);
- VCross (Temp_Vector, Given_Vp->Direction, Given_Vp->Up);
- VDot (Handedness, Temp_Vector, Given_Vp->Right);
- Parse_Vector(&Given_Vp->Direction);
-
- VSub (Given_Vp->Direction, Given_Vp->Direction, Given_Vp->Location);
- VNormalize (Given_Vp->Direction, Given_Vp->Direction);
- VCross(Given_Vp->Right, Given_Vp->Direction, Given_Vp->Sky);
- VNormalize (Given_Vp->Right, Given_Vp->Right);
- VCross (Given_Vp->Up, Given_Vp->Right, Given_Vp->Direction);
- VScale (Given_Vp->Direction, Given_Vp->Direction, Direction_Length);
- if (Handedness >= 0.0) {
- VScale (Given_Vp->Right, Given_Vp->Right, Right_Length);
- }
- else {
- VScale (Given_Vp->Right, Given_Vp->Right, -Right_Length);
- }
-
- VScale (Given_Vp->Up, Given_Vp->Up, Up_Length);
- END_CASE
-
- CASE (TRANSLATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Translate ((OBJECT *) Given_Vp, &Local_Vector);
- END_CASE
-
- CASE (ROTATE_TOKEN)
- Parse_Vector (&Local_Vector);
- Rotate ((OBJECT *) Given_Vp, &Local_Vector);
- END_CASE
-
- CASE (SCALE_TOKEN)
- Parse_Vector (&Local_Vector);
- Scale ((OBJECT *) Given_Vp, &Local_Vector);
- END_CASE
-
- CASE (RIGHT_CURLY_TOKEN)
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (RIGHT_CURLY_TOKEN);
- END_CASE
- END_EXPECT
- }
-
- void Parse_Declare ()
- {
- CONSTANT Constant_Id;
- TEXTURE *Local_Texture;
- TEXTURE *temp_texture;
- struct Constant_Struct *Constant_Ptr;
-
- GET (IDENTIFIER_TOKEN);
- if ((Constant_Id = Find_Constant()) == -1)
- if (++Number_Of_Constants >= MAX_CONSTANTS)
- Error ("Too many constants \"declared\"");
- else
- Constant_Id = Number_Of_Constants;
-
- Constant_Ptr = &(Constants[(int)Constant_Id]);
- GET (EQUALS_TOKEN);
-
- EXPECT
- CASE (OBJECT_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Object();
- Constant_Ptr -> Constant_Type = OBJECT_CONSTANT;
- EXIT
- END_CASE
-
- CASE (SPHERE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Sphere ();
- Constant_Ptr -> Constant_Type = SPHERE_CONSTANT;
- EXIT
- END_CASE
-
- CASE (PLANE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Plane ();
- Constant_Ptr -> Constant_Type = PLANE_CONSTANT;
- EXIT
- END_CASE
-
- CASE (TRIANGLE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Triangle ();
- Constant_Ptr -> Constant_Type = TRIANGLE_CONSTANT;
- EXIT
- END_CASE
-
- CASE (SMOOTH_TRIANGLE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Smooth_Triangle ();
- Constant_Ptr -> Constant_Type = SMOOTH_TRIANGLE_CONSTANT;
- EXIT
- END_CASE
-
- CASE (QUADRIC_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Quadric ();
- Constant_Ptr -> Constant_Type = QUADRIC_CONSTANT;
- EXIT
- END_CASE
-
- CASE (CUBIC_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Poly (3);
- Constant_Ptr -> Constant_Type = POLY_CONSTANT;
- EXIT
- END_CASE
-
- CASE (QUARTIC_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Poly (4);
- Constant_Ptr -> Constant_Type = POLY_CONSTANT;
- EXIT
- END_CASE
-
- CASE (HEIGHT_FIELD_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Height_Field ();
- Constant_Ptr -> Constant_Type = HEIGHT_FIELD_CONSTANT;
- EXIT
- END_CASE
-
- CASE (POLY_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Poly (0);
- Constant_Ptr -> Constant_Type = POLY_CONSTANT;
- EXIT
- END_CASE
-
- CASE (BOX_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Box ();
- Constant_Ptr -> Constant_Type = BOX_CONSTANT;
- EXIT
- END_CASE
-
- CASE (BLOB_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Blob ();
- Constant_Ptr -> Constant_Type = BLOB_CONSTANT;
- EXIT
- END_CASE
-
- CASE (BICUBIC_PATCH_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Bicubic_Patch ();
- Constant_Ptr -> Constant_Type = BICUBIC_PATCH_CONSTANT;
- EXIT
- END_CASE
-
- CASE (INTERSECTION_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_CSG(CSG_INTERSECTION_TYPE, NULL);
- Constant_Ptr -> Constant_Type = CSG_INTERSECTION_CONSTANT;
- EXIT
- END_CASE
-
- CASE (UNION_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_CSG(CSG_UNION_TYPE, NULL);
- Constant_Ptr -> Constant_Type = CSG_UNION_CONSTANT;
- EXIT
- END_CASE
-
- CASE (DIFFERENCE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_CSG(CSG_DIFFERENCE_TYPE, NULL);
- Constant_Ptr -> Constant_Type = CSG_DIFFERENCE_CONSTANT;
- EXIT
- END_CASE
-
- CASE (COMPOSITE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Composite();
- Constant_Ptr -> Constant_Type = COMPOSITE_CONSTANT;
- EXIT
- END_CASE
-
- CASE (TEXTURE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Local_Texture = NULL;
- Constant_Ptr -> Constant_Data = (char *) Local_Texture;
- Constant_Ptr -> Constant_Type = TEXTURE_CONSTANT;
- UNGET
- EXPECT
- CASE (TEXTURE_TOKEN)
- Local_Texture = Default_Texture;
- Local_Texture = Parse_Texture ();
- if (Local_Texture->Constant_Flag)
- Local_Texture = Copy_Texture(Local_Texture);
-
- Local_Texture -> Constant_Flag = TRUE;
-
- {
- for (temp_texture = Local_Texture ;
- temp_texture->Next_Texture != NULL ;
- temp_texture = temp_texture->Next_Texture)
- {}
-
- temp_texture->Next_Texture = (TEXTURE *) Constant_Ptr->Constant_Data;
- Constant_Ptr->Constant_Data = (char *) Local_Texture;
- }
- END_CASE
-
- OTHERWISE
- UNGET
- EXIT
- END_CASE
- END_EXPECT
- EXIT
- END_CASE
-
- CASE (VIEW_POINT_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Get_Viewpoint();
- Constant_Ptr -> Constant_Type = VIEW_POINT_CONSTANT;
- Parse_Viewpoint((VIEWPOINT *) Constant_Ptr -> Constant_Data);
- EXIT
- END_CASE
-
- CASE (COLOUR_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Get_Colour();
- Constant_Ptr -> Constant_Type = COLOUR_CONSTANT;
- Parse_Colour ((COLOUR *) Constant_Ptr -> Constant_Data);
- EXIT
- END_CASE
-
- CASE (LIGHT_SOURCE_TOKEN)
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Parse_Light_Source ();
- Constant_Ptr -> Constant_Type = LIGHT_SOURCE_CONSTANT;
- EXIT
- END_CASE
-
-
- CASE (LEFT_ANGLE_TOKEN)
- UNGET
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Get_Vector();
- Constant_Ptr -> Constant_Type = VECTOR_CONSTANT;
- Parse_Vector((VECTOR *) Constant_Ptr -> Constant_Data);
- EXIT
- END_CASE
-
- CASE3 (DASH_TOKEN, PLUS_TOKEN, FLOAT_TOKEN)
- UNGET
- Constant_Ptr -> Identifier_Number = Token.Identifier_Number;
- Constant_Ptr -> Constant_Data = (char *) Get_Float();
- Constant_Ptr -> Constant_Type = FLOAT_CONSTANT;
- *((DBL *) Constant_Ptr -> Constant_Data) = Parse_Float();
- EXIT
- END_CASE
-
- OTHERWISE
- Parse_Error (OBJECT_TOKEN);
- END_CASE
- END_EXPECT
- }
-
- void Init_Viewpoint (vp)
- VIEWPOINT *vp;
- {
- vp -> Methods = (void *) &Viewpoint_Methods;
- vp -> Type = VIEWPOINT_TYPE;
- Make_Vector (&vp->Location, 0.0, 0.0, 0.0);
- Make_Vector (&vp->Direction, 0.0, 0.0, 1.0);
- Make_Vector (&vp->Up, 0.0, 1.0, 0.0);
- Make_Vector (&vp->Right, 1.33, 0.0, 0.0);
- Make_Vector (&vp->Sky, 0.0, 1.0, 0.0);
- }
-
- void Link (New_Object, Field, Old_Object_List)
- OBJECT *New_Object, **Field, **Old_Object_List;
- {
- *Field = *Old_Object_List;
- *Old_Object_List = New_Object;
- }
- static void Link_Shapes (New_Object, Field, Old_Object_List)
- LIGHT_SHAPE *New_Object, **Field, **Old_Object_List;
- {
- *Field = *Old_Object_List;
- *Old_Object_List = New_Object;
- }
-
-
- CONSTANT Find_Constant()
- {
- register int i;
-
- for (i = 1 ; i <= Number_Of_Constants ; i++)
- if (Constants [i].Identifier_Number == Token.Identifier_Number)
- return (i);
-
- return (-1);
- }
-
-
- char *Get_Token_String (Token_Id)
- TOKEN Token_Id;
- {
- register int i;
-
- for (i = 0 ; i < LAST_TOKEN ; i++)
- if (Reserved_Words[i].Token_Number == Token_Id)
- return (Reserved_Words[i].Token_Name);
- return ("");
- }
-
- void Parse_Error (Token_Id)
- TOKEN Token_Id;
- {
- char *expected, *found;
- FILE *stat_file;
- fprintf (stderr, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- expected = Get_Token_String (Token_Id);
- found = Get_Token_String (Token.Token_Id);
- fprintf (stderr, "%s expected but %s found instead\n", expected, found);
- if (Options & VERBOSE_FILE){
- stat_file = fopen(Stat_File_Name,"w+t");
- fprintf (stat_file, "%s expected but %s found instead\n", expected, found);
- fclose(stat_file);
- }
-
- exit(1);
- }
-
- void Type_Error ()
- {
- FILE *stat_file;
- fprintf (stderr, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- fprintf (stderr, "Identifier %s is the wrong type\n", Token.Token_String);
- if (Options & VERBOSE_FILE){
- stat_file = fopen(Stat_File_Name,"w+t");
- fprintf (stat_file, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- fprintf (stat_file, "Identifier %s is the wrong type\n", Token.Token_String);
-
- fclose(stat_file);
- }
-
- exit (1);
- }
-
- void Undeclared ()
- {
- FILE *stat_file;
- fprintf (stderr, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- fprintf (stderr, "Undeclared identifier %s\n", Token.Token_String);
- if (Options & VERBOSE_FILE){
- stat_file = fopen(Stat_File_Name,"w+t");
- fprintf (stat_file, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- fprintf (stat_file, "Undeclared identifier %s\n", Token.Token_String);
- fclose(stat_file);
- }
-
- exit (1);
- }
-
- void Error (str)
- char *str;
- {
- FILE *stat_file;
- fprintf (stderr, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- fprintf (stderr,"%s\n",str);
-
- if (Options & VERBOSE_FILE){
- stat_file = fopen(Stat_File_Name,"w+t");
- fprintf (stat_file, "Error in file %s line %d\n", Token.Filename,
- Token.Token_Line_No+1);
- fprintf (stat_file,"%s\n",str);
- fclose(stat_file);
- }
- exit (1);
- }
-
- static void Post_Process_Object (Object)
- OBJECT *Object;
- {
- OBJECT *Temp;
-
- if (Object->Type == COMPOSITE_TYPE)
- for (Temp = ((COMPOSITE *)Object) -> Objects;
- Temp != NULL ;
- Temp = Temp->Next_Object)
- Post_Process_Object (Temp);
- else
- Post_Process_Shape (Object->Shape);
- }
-
- static void Post_Process_Shape (Shape)
- SHAPE *Shape;
- {
- SHAPE *Temp_Shape;
-
- if ((Shape->Type == CSG_UNION_TYPE)
- || (Shape->Type == CSG_INTERSECTION_TYPE)
- || (Shape->Type == CSG_DIFFERENCE_TYPE))
- for (Temp_Shape = ((CSG_SHAPE *)Shape)->Shapes;
- Temp_Shape != NULL ;
- Temp_Shape = Temp_Shape->Next_Object)
- Post_Process_Shape(Temp_Shape);
- else
- if ((Shape->Type == POINT_LIGHT_TYPE)
- ||(Shape->Type == SPOT_LIGHT_TYPE))
- Link_Shapes ((LIGHT_SHAPE *)Shape,
- &(((LIGHT_SHAPE *)Shape)->Next_Light_Source),
- &(Parsing_Frame_Ptr -> Light_Sources));
- }
-